* {
    margin: auto;
    padding: auto;
}

li:hover {
    text-decoration: underline;
}

img,
p {
    margin: 0 10px;
}

a,
button {
    cursor: pointer;
}

a {
    color: white;
    text-decoration: none
}

a:visited {
    color: white;
}

button:hover {
    background-color: whitesmoke;
}

body {
    background-color: black;
    color: white;
}

.top {
    background-color: #444444;
    height: 100px;
}

.biaoti {
    float: left;
    font-size: 50px;
    margin: 10px;
    font-weight: 600;
}

.suoyin {
    float: left;
    padding: 20px 10px;
    margin: 20px 0;
}

.suoyin:hover {
    background-color: gray;
}

.denglu {
    float: right;
    margin: 10px;
}

.middle {
    background-color: rgb(30, 30, 30);
    width: 980px;
    height: 1550px;
    border-left: 1px solid rgb(30, 30, 30);
    border-right: 1px solid rgb(30, 30, 30);
}

.top2 {
    width: 900px;
    height: 50px;
    background-color: rgb(20, 20, 20);
}

.top2 a {
    padding: 15px 30px;
    float: left;
    width: 64px;
}

.top2 a:hover {
    background-color: grey;
}

.top2 a ul {
    display: none;
    list-style-type: none;
    margin: 0;
    padding: 0;
    margin-top: 10px;
}

.top2 a ul li {
    height: 30px;
}

.sousuo {
    float: left;
    padding-top: 15px;
    padding-left: 170px;
}

.middle1 {
    width: 900px;
    height: 440px;
    margin: 0 auto;
    margin-top: 20px;
    background-color: black;
    float: left;
}

.lunbo {
    display: none;
}

.lunbo img {
    width: 600px;
    float: left;
}

.xiaotu {
    font-size: 20px;
}

.xiaotu img {
    width: 120px;
    float: none;
    margin: 5px;
    cursor: pointer;
}

.xiaotu div {
    height: 100px;
    font-size: small;
}

.hengtiao {
    margin: 0 auto;
}

.hengtiao {
    width: 100px;
    text-align: center;
}

.hengtiao li {
    width: 20px;
    height: 20px;
    display: inline-block;
    background-color: grey;
    border-radius: 50%;
    cursor: pointer;
}

.middle2 {
    width: 900px;
    height: 450px;
    float: left;
    margin-top: 50px;
}

.middle2 div {
    margin: 10px;
    width: 280px;
    float: left;
    background-color: black;
    color: white;
}

.middle2 img {
    width: 280px;
    margin: auto;
}

.middle2 a {
    background-color: green;
    color: greenyellow;
    padding: 0 5px;
    font-size: larger;
}

.middle3 {
    height: 500px;
    width: 900px;
    float: left;
    background-color: rgb(20, 20, 20);
}

.middle3 button {
    width: 205px;
    height: 50px;
    font-size: 30px;
    font-weight: 700;
    margin: 5px 5px;
    background-color: gainsboro;
}

.tab img {
    width: 400px;
    margin: 5px 23px;
}

.bottom {
    height: 100px;
    width: 980px;
    background-color: black;
    border-left: 1px solid rgb(30, 30, 30);
    border-right: 1px solid rgb(30, 30, 30);
    text-align: center;
    padding-top: 10px;
}

.bottom a {
    background-color: grey;
    font-size: 30px;
    float: left;
}

.daohang {
    top: calc(50%);
    right: 185px;
    position: fixed;
}

.daohang li {
    cursor: pointer;
    list-style-type: none;
    background-color: grey;
    padding: 10px;
}